Strict Password Validation in Java

Below is the code snippet for Validation of the strong password.

public void passwordChecker(String password) {
boolean flag = true;
   //Check for minimum 8 character
if(password.length() < 8){
flag = false;
}
//check for at least on Alphanumeric (including combination of Capital and Small letters) characters
flag = password.matches(".*[A-Z].*") && password.matches(".*[a-z].*") && password.matches(".*[1-9].*");
System.out.println(flag);

if(flag){
//Check for at least one Special Characters
flag = password.matches(".*[!@#$%^&*|_+-].*");
System.out.println(flag);
}

//System.out.println(flag);

System.out.println("test : " + flag);

}

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